# key\_event.h<a name="ZH-CN_TOPIC_0000001054918127"></a>

## **Overview**<a name="section1955985709093526"></a>

**Related Modules:**

[Graphic](Graphic.md)

**Description:**

Declares a key event, which indicates that a physical button is pressed or released. 

**Since:**

1.0

**Version:**

1.0

## **Summary**<a name="section935420477093526"></a>

## Data Structures<a name="nested-classes"></a>

<a name="table2081314236093526"></a>
<table><thead align="left"><tr id="row276756446093526"><th class="cellrowborder" valign="top" width="50%" id="mcps1.1.3.1.1"><p id="p1088414894093526"><a name="p1088414894093526"></a><a name="p1088414894093526"></a>Data Structure Name</p>
</th>
<th class="cellrowborder" valign="top" width="50%" id="mcps1.1.3.1.2"><p id="p896151682093526"><a name="p896151682093526"></a><a name="p896151682093526"></a>Description</p>
</th>
</tr>
</thead>
<tbody><tr id="row1405548093093526"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.1 "><p id="p1205021675093526"><a name="p1205021675093526"></a><a name="p1205021675093526"></a><a href="OHOS-KeyEvent.md">OHOS::KeyEvent</a></p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.2 "><p id="p220479768093526"><a name="p220479768093526"></a><a name="p220479768093526"></a>Defines a key event, which indicates that a physical button is pressed or released. </p>
</td>
</tr>
</tbody>
</table>